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Re: Do MSD boxes or coils give a clue before they quit?
[Re: Mr. T]
#1681088
10/03/14 01:18 AM
10/03/14 01:18 AM
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Joined: Jan 2007
Posts: 345
iowa
wesw
enthusiast
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enthusiast
Joined: Jan 2007
Posts: 345
iowa
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yep. made a pass and shut it off my digital 7 never worked again.  had to buy a 7Al3 from someone at the track to finish the race.
598 ci predator
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: bonefish]
#1681095
10/03/14 01:55 PM
10/03/14 01:55 PM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,163
CT
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Not sure, mine just went though. I layed into the car and it broke up, tach bouncing all over the place. Tried to ease into it, same thing. Would rev up clean with the clutch in and ran fine if you drove it easy. Started heading home and made it about a mile before it crapped out. When it died it was actually running, barely, with the tach at 0. Tried to refire, tach bouncing everywhere and ran for about 10 seconds, then died.
Thinking back on it, the car has smelled a little gassy at idle for the past 2-3 weeks and when I got on it with a buddy a few weeks back I swear it broke up and missed a little in first.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: GTX MATT]
#1681096
10/03/14 03:20 PM
10/03/14 03:20 PM
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Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
CHAPPER
master
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master
Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
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Quote:
Not sure, mine just went though. I layed into the car and it broke up, tach bouncing all over the place. Tried to ease into it, same thing. Would rev up clean with the clutch in and ran fine if you drove it easy. Started heading home and made it about a mile before it crapped out. When it died it was actually running, barely, with the tach at 0. Tried to refire, tach bouncing everywhere and ran for about 10 seconds, then died.
Thinking back on it, the car has smelled a little gassy at idle for the past 2-3 weeks and when I got on it with a buddy a few weeks back I swear it broke up and missed a little in first.
Just went through the same thing a few weeks ago. Ran fine until under a load. Free revved fine, ran fine in water box...as soon as the motor was under load, it would break up/miss on both sides. The box I had on the car was made in '94 according to the number code on the back. I had another box on my run-in stand that was new in '01. I switched the boxes and coils and the miss went away. I sent the old box and coil back to MSD to be tested together and repaired if needed. I got them back in about 2 weeks. They sent the test papers of both. The coil was OK but the box failed. They put 3-4 electrical components in and re-tested for 2 hours at 4000 RPM...test OK/Pass. Cost with shipping was $61.xx. I had never had a box cause a miss before. Others have told me they had. I had only experienced them just completely failing, as in NO start. 
If you like drag racing, support your local track.
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: CHAPPER]
#1681099
10/03/14 04:22 PM
10/03/14 04:22 PM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,163
CT
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Quote:
Quote:
Not sure, mine just went though. I layed into the car and it broke up, tach bouncing all over the place. Tried to ease into it, same thing. Would rev up clean with the clutch in and ran fine if you drove it easy. Started heading home and made it about a mile before it crapped out. When it died it was actually running, barely, with the tach at 0. Tried to refire, tach bouncing everywhere and ran for about 10 seconds, then died.
Thinking back on it, the car has smelled a little gassy at idle for the past 2-3 weeks and when I got on it with a buddy a few weeks back I swear it broke up and missed a little in first.
Just went through the same thing a few weeks ago. Ran fine until under a load. Free revved fine, ran fine in water box...as soon as the motor was under load, it would break up/miss on both sides. The box I had on the car was made in '94 according to the number code on the back. I had another box on my run-in stand that was new in '01. I switched the boxes and coils and the miss went away. I sent the old box and coil back to MSD to be tested together and repaired if needed. I got them back in about 2 weeks. They sent the test papers of both. The coil was OK but the box failed. They put 3-4 electrical components in and re-tested for 2 hours at 4000 RPM...test OK/Pass. Cost with shipping was $61.xx. I had never had a box cause a miss before. Others have told me they had. I had only experienced them just completely failing, as in NO start.
Got my RMA and am planning to ship it to them this afternoon. Did your tach go nuts too?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: GTX MATT]
#1681100
10/03/14 07:37 PM
10/03/14 07:37 PM
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Joined: Nov 2003
Posts: 10,384
Upstate NY
Bigcube
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,384
Upstate NY
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Back in 08' I bought a brand new Digital 7, it was DOA. I sent it back and they repaired it. Ran a total of about 1/2 hour. Two days later, no spark. No warning on that one. Sent it back again and this time they replaced it. Drove it a couple time this summer, then no spark. Was worried it was the box again, turned out it was the crank trigger PU. No waring on that one either. I think it's an MSD trait LOL
Jim
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: GTX MATT]
#1681102
10/03/14 10:02 PM
10/03/14 10:02 PM
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Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
CHAPPER
master
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master
Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
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Quote:
Quote:
Quote:
Not sure, mine just went though. I layed into the car and it broke up, tach bouncing all over the place. Tried to ease into it, same thing. Would rev up clean with the clutch in and ran fine if you drove it easy. Started heading home and made it about a mile before it crapped out. When it died it was actually running, barely, with the tach at 0. Tried to refire, tach bouncing everywhere and ran for about 10 seconds, then died.
Thinking back on it, the car has smelled a little gassy at idle for the past 2-3 weeks and when I got on it with a buddy a few weeks back I swear it broke up and missed a little in first.
Just went through the same thing a few weeks ago. Ran fine until under a load. Free revved fine, ran fine in water box...as soon as the motor was under load, it would break up/miss on both sides. The box I had on the car was made in '94 according to the number code on the back. I had another box on my run-in stand that was new in '01. I switched the boxes and coils and the miss went away. I sent the old box and coil back to MSD to be tested together and repaired if needed. I got them back in about 2 weeks. They sent the test papers of both. The coil was OK but the box failed. They put 3-4 electrical components in and re-tested for 2 hours at 4000 RPM...test OK/Pass. Cost with shipping was $61.xx. I had never had a box cause a miss before. Others have told me they had. I had only experienced them just completely failing, as in NO start.
Got my RMA and am planning to ship it to them this afternoon. Did your tach go nuts too?
YES...I didn't give ALL the info on my problem!! I will try to now,,,
The first time it started acting up, I thought it was just the spark plugs needing replaced. I replaced them and still had the missing problem. I was CERTAIN it was an electrical/ignition problem. I inspected/replaced the cap & rotor with new ones. They looked OK to me. While I was running the car in the garage,,adjusting carb/etc, trying to get it to sound right, I looked in the car at the tach to set idle RPM, I saw the tach was jumping from 1100rpm to 2800 rpm with NO change in engine speed. I had an older Sun tach (period correct) with an MSD tach adapter to run it. I figured THERE is the problem!! So I put a new Autometer tach in that I had on the shelf. The tach jumping went away, but the miss was still there. As I have said, the miss was only under load,,so I had to make a few hits on the street in front of the shop. I did a leak down on the engine and a valve spring test,,,all checked OK. THEN, I changed the box and coil,,,,also, I replaced the wires. I am SURE the box was the problem. My wires were fine ohm checking wise, with no oil saturation or chaffing/etc. I am sure the box was the culprit...my first time to experience this type of problem, but 
If you like drag racing, support your local track.
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: Monte_Smith]
#1681105
10/04/14 09:32 AM
10/04/14 09:32 AM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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My msd box(digital 6+) gave me smoke signals when it failed on drag week last year. It did give me a little notice though, it started to smell right before that lol. Actually it didn't want to start at the checkpoint just a few miles prior to where it died. I had a coil go bad on me last year on drag week as well.
My biggest msd problem is a digital 6 I have that misses in high gear. I replaced the box and the miss went away. I had msd check the box last year and it worked fine for them. I had to use that box as my spare this year and sure enough the high gear miss was still there.
68 Barracuda Formula S 340
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Re: Do MSD boxes or coils give a clue before they quit?
[Re: Bad340fish]
#1681106
10/04/14 10:13 AM
10/04/14 10:13 AM
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Joined: Jan 2004
Posts: 1,468
N.Y.
sixpacksteve
pro stock
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pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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There sort of like women fine 1 minute the next not so much!
Hell Hath No Fury Like Mine
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